package homework.ooday01._cp;

public class ConsDemo {
    public static void main(String[] args) {
        Student stu1 = new Student();
        Student stu2 = new Student("李四",852);
        Student stu3 = new Student("王五",99,"2205","0456");
        stu1.sayHi();
        stu2.sayHi();
        stu3.sayHi();
    }
}
